基于三维数据的微粒群反演汶川地震同震滑动
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摘要
采用2008-05-28汶川大地震的GPS三维同震形变数据,运用微粒群算法,结合位错理论模型,反演龙门山断裂的三维滑动速率。结果表明,龙门山主山前边界大断裂、龙门山后山大断裂、龙门山主中央大断裂均呈现逆冲特征,其中,龙门山主中央大断裂还具有右旋走滑趋势;龙门山主中央大断裂的滑动速率最大,且断层的滑动速率与地表同震位移具有同步响应特征。
Using the three-dimensional coseismic formation GPS data of Wenchuan earthquake in 2008,combined with the dislocation model,the three dimensional velocity of Longmenshan fault is inversed by PSO.The result shows that:Longmenshan Shanqian,Longmenshan Houshan,and Longmenshan Zhongyang faults are reverse faults.Longmenshan Zhongyang fault has dextral character.The greatest velocity is at Longmenshan Zhongyang fault.The slip velocity of the fault corresponds with coseimic dislocation on earth.
Using the three-dimensional coseismic formation GPS data of Wenchuan earthquake in 2008,combined with the dislocation model,the three dimensional velocity of Longmenshan fault is inversed by PSO.The result shows that:Longmenshan Shanqian,Longmenshan Houshan,and Longmenshan Zhongyang faults are reverse faults.Longmenshan Zhongyang fault has dextral character.The greatest velocity is at Longmenshan Zhongyang fault.The slip velocity of the fault corresponds with coseimic dislocation on earth.
引文
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[16]张培震,闻学泽,徐锡伟,等.2008年汶川8.0级特大地震孕育和发生的多单元组合模式[J].科学通报,2009,54(7):944-953(Tectonic Model of the Great Wenchuan Earthquake of May 12,2008,Sichuan,China[J].Chinese Sci Bull,2009,54(7):944-953)
[17]郝明,王庆良,崔笃信,等.根据GPS和水准资料反演2008年汶川地震同震破裂模型[J].地震研究,2012,35(3):323-329(Hao Ming,Wang Qingliang,Cui Duxin,et al.Co-Seismic Rupture Model of Wenchuan M8.0Earthquake in 2008Inversed from GPS and Precise Leveling Observation Data[J].Journal of Seismological Research,2012,35(3):323-329)
[18]王敏.基于GPS同震位移场约束反演2008年5.12汶川大地震破裂空间分布[J].地球物理学报,2009,52(10):2 519-2 526(Wang Min.Coseismic Slip Distribution of the 2008Wenchuan Great Earthquake Constrained Using GPS Coseismic Displacement Field[J].Journal of Geophysics,2009,52(10):2 519-2 526)
[19]许才军,刘洋,温扬茂.利用GPS资料反演汶川MW7.9地震滑动分布[J].测绘学报,2009,38(3):195-201(Xu Caijun,Liu Yang,Wen Yangmao.MW7.9 Wenchuan Earthquake Slip Distribution Inversion from GPS Measurements[J].Acta Geodaetica et Cartographica Sinica,38(3):195-201)
[2]唐文清,刘宇平,陈智梁,等.基于GPS技术的活动断裂监测——以鲜水河、龙门山断裂为例[J].山地学报,2007,25(1):103-107(Tang Wenqing,Liu Yuping,Chen Zhiliang,et al.Monitoring of Faults Activity Based on GPS[J].Journal of Mountain Science,2007,25(1):103-107)
[3]刘树根,罗志立,戴苏兰,等.龙门山冲断带的隆升和川西前陆盆地的沉降[J].地质学报,1995,69(3):204-214(Liu Shugen,Luo Zhili,Dai Sulan,et al.The Uplift of the Longmenshan Thrust Belt and Subsidence of the Westerns Sichuan Foreland Basin[J].Acta Geologica Sinica,1995,69(3):204-214)
[4]李勇,黄润秋,周荣军,等.龙门山地震带的地质背景与汶川地震的地表破裂[J].工程地质学报,2009,17(1):3-16(Li Yong,Huang Runqiu,Zhou Rongjun,et al.Geological Background of Longmenshan Seismic Belt and Surface Ruptures in Wenchuan Earthquake[J].Journal of Engineering Geology,2009,17(1):3-16)
[5]刘杰.微粒群算法反演断层滑动速率[D].西安:长安大学,2011(Liu Jie.Three-Dimension Slip Velocity of Faults Inversed by Particle Swarm Optimization[D].Xi’an:Chang’an University,2011)
[6] Kennedy J,Eberhart R C.A Discrete Binary Version of the Particle Swarm Algorithm[C].World Multiconference on Systemics,Cybernetics and Informatics,Piscataway,1997
[7]刘杰,张永志,张秀霞,等.基于GPS数据的粒子群算法反演断层三维滑动速率[J].大地测量与地球动力学,2010,30(2):40-42(Liu Jie,Zhang Yongzhi,Zhang Xiuxia,et al.3D Fault Slip Velocity Inversion by Using Particle Swarm Optimization Algorithm from GPS Data[J].Journal of Geodesy and Geodynamics,2010,30(2):40-42)
[8] Eberhart R C,Shi Y H.Particle Swarm Optimization:Developments,Applications and Resources[C].IEEE Congress on Evolutionary Computation,Piscataway,2001
[9] Okada Y.Surface Deformation Due to Shear and Tensile Faults in a Half Space[J].Bulletin of the Seismological Society of America,1985,75(4):1 135-1 154
[10]Okada Y.Internal Deformation Due to Shear and Tensile Faults in a Half-Space[J].Bulletin of the Seismological Society of America,1992,82(2):1 018-1 040
[11]刘杰,张永志.GPS重力数据的微粒群算法联合反演断层三维滑动速率[J].测绘科学,2011,36(4):95-97(Liu Jie,Zhang Yongzhi.Fault Slip Velocity Inversion by Using the Particle Swarm Optimization Algorithm with GPS and Gravity Data[J].Science of Surveying and Mapping,2011,36(4):95-97)
[12]谈洪波,申重阳,李辉.断层位错引起的地表重力变化特征研究[J].大地测量与地球动力学,2008,28(4):54-62(Tan Hongbo,Shen Chongyang,Li Hui.Characteristics of Surface Gravity Changes Caused by a Fault or Faults Dislocation[J].Journal of Geodesy and Geodynamics,2008,28(4):54-62)
[13]马寅生,龙长兴,谭成轩,等.四川汶川MS8.0级地震同震变形特征和分段性[J].地质通报,2008,27(12):2 076-2 085(Ma Yinsheng,Long Changxing,Tan Chengxuan,et al.Co-Seismic Deformation Features and Segmentation of the MS8.0 Wenchuan Earthquake in Sichuan,China[J].Geological Bulletin of China,2008,27(12):2 076-2 085)
[14]《活动断裂研究》编委会,国家地震局地质研究所.活动断裂研究:理论与应用[M].北京:地震出版社,1998(Editorial Committee of Research on Active Fault,Institute of Geology,CEA.Research on Active Fault:Theory and Application[M].Beijing:Seismological Press,1998)
[15]徐锡伟,闻学泽,叶建青,等.汶川MS8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629(Xu Xiwei,Wen Xueze,Ye Jianqing,et al.The MS8.0 Wenchuan Earthquake Surface Ruptures and Its Seismogenic Structure[J].Seismology and Geology,2008,30(3):597-629)
[16]张培震,闻学泽,徐锡伟,等.2008年汶川8.0级特大地震孕育和发生的多单元组合模式[J].科学通报,2009,54(7):944-953(Tectonic Model of the Great Wenchuan Earthquake of May 12,2008,Sichuan,China[J].Chinese Sci Bull,2009,54(7):944-953)
[17]郝明,王庆良,崔笃信,等.根据GPS和水准资料反演2008年汶川地震同震破裂模型[J].地震研究,2012,35(3):323-329(Hao Ming,Wang Qingliang,Cui Duxin,et al.Co-Seismic Rupture Model of Wenchuan M8.0Earthquake in 2008Inversed from GPS and Precise Leveling Observation Data[J].Journal of Seismological Research,2012,35(3):323-329)
[18]王敏.基于GPS同震位移场约束反演2008年5.12汶川大地震破裂空间分布[J].地球物理学报,2009,52(10):2 519-2 526(Wang Min.Coseismic Slip Distribution of the 2008Wenchuan Great Earthquake Constrained Using GPS Coseismic Displacement Field[J].Journal of Geophysics,2009,52(10):2 519-2 526)
[19]许才军,刘洋,温扬茂.利用GPS资料反演汶川MW7.9地震滑动分布[J].测绘学报,2009,38(3):195-201(Xu Caijun,Liu Yang,Wen Yangmao.MW7.9 Wenchuan Earthquake Slip Distribution Inversion from GPS Measurements[J].Acta Geodaetica et Cartographica Sinica,38(3):195-201)